Bill Nye Earth Flashcards
What is the earth’s crust made up of?
A thin layer of solid rock
Underneath the earth’s crust is what?
Molten rock
What is the earth’s core made of?
Solid iron
What is the core’s temperature?
1500 °C
What is the outer core made of?
Iron and other metals
What is the mantle made of?
Gooey, hot tar
What is the mantle’s temperature?
1200 °C
What is said about the crust?
It’s thin, cool, and sustains life
What are 2 facts about Mt. St. Helen’s?
It is a very young and active volcano, and it was erupting when the first pioneers came to the area
What is it called when a biological recovery occurs after a volcano creates habitats?
A re-assembly of life
A geyser is what?
Where heat from under the earth’s crust erupts with boiling water/steam
What are tectonic plates?
Plates that float on the earth’s mantle and make up the crust
All the plates of the earth’s crust were once one piece called what?
Pangaea
Where are volcanoes formed?
Where the plates are drifting apart
What happens when plates come together?
Mountains are formed
Which continent is North America moving away from?
Europe
Earthquakes are caused by what?
Shifting tectonic plates
What is the name of the machine that monitors the earth’s plates?
Seismograph
How thick is the earth’s core?
2,800 km
What are the layers of the earth?
Inner core, outer core, lower mantle, upper mantle and the crust
Who suggested the concept of Pangaea?
Alfred Wegener
